go with whatever works for you. i've seen $20 barrels out shot $120 barrels. 2 piece shot darts over 1 piece, then the same paint, same barrel different day, the one piece is better. i've had my freak shoot like crap, but my Dye 1 piece freak'd shoot darts. there is no rhyme, no reason.
try something different, try something that you want. there is no ONE best barrel, just like there is no ONE best gun. so go with what works for you and what you like. opinions are like barrels and there are plenty of "barrels" out there on the market.